Using wenner probe resistivity to estimate chloride diffusion coefficients in concrete

Mike Otieno, Lombe Mutale, Hans Beushausen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study compared and contrasted the surface concrete resistivity test measured with the Wenner probe, with the chloride conductivity index (CCI) test in terms of their application in the design of reinforced concrete (RC) structures. Chloride diffusion coefficient and time to corrosion initiation (ti) were estimated using diffusion-based and resistivity-based service life prediction models. The resistivity-based prediction model results in ti values similar to those for the diffusion-based model only for CEM I and slag concretes at 0.40 w/b ratio. An inverse relationship was found between Wenner probe resistivity and the diffusion coefficient obtained from the diffusion-based model. Concrete resistivity measurements from the Wenner probe technique have a potential of being used to estimate chloride diffusion coefficients in concrete but more studies are still required.

Original languageEnglish
Title of host publicationFib Symposium 2016
Subtitle of host publicationPerformance-Based Approaches for Concrete Structures, Proceedings
EditorsHans Beushausen
Publisherfib. The International Federation for Structural Concrete
Pages1-8
Number of pages8
ISBN (Print)9782883941229
Publication statusPublished - 2016
Externally publishedYes
EventInternational fib Symposium on Performance-Based Approaches for Concrete Structures, 2016 - Cape Town, South Africa
Duration: 21 Nov 201623 Nov 2016

Publication series

Namefib Symposium
ISSN (Print)2617-4820

Conference

ConferenceInternational fib Symposium on Performance-Based Approaches for Concrete Structures, 2016
Country/TerritorySouth Africa
CityCape Town
Period21/11/1623/11/16

Keywords

  • Chloride conductivity
  • Diffusion coefficient
  • Resistivity
  • Wenner probe

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